The CW has posted a mid-season extended trailer for Arrow today. The trailer which is almost two minutes long shows some clips from the last couple of episodes and some upcoming episodes. And from the looks of things, they are going to be pretty action packed! We also get to see Oliver Queen receive his training on the island, from non other than Slade Wilson, aka Deathstroke! Watch the trailer below, and watch new episodes of Arrow on The CW, Wednesdays at 8pm EST.